Drexel University found a new application of MXene material, which can shield 99% of radiation

This month, the four-year-old Havana syndrome finally has a reasonable explanation. A new report issued by the National Academy of Sciences stated that a series of mysterious neurological diseases previously reported may be caused by directed microwave energy.    Microwave radiation usually refers to electromagnetic waves with a frequency of 300 to 300,000 MHz and a wavelength of less than 1 m. It is a physical source of pollution and is not easy to detect.    More than a certain amount of microwave radiation can cause harm to the human body. The specific impact is mainly on the central nervous system, which may cause headaches, dizziness, sleep problems, memory loss and so on. In addition, it will also affect the cardiovascular system and reproductive system.    Microwave radiation is very widespread in life, and there is a small amount of microwave radiation in mobile phones, microwave ovens, and routers. However, since the value is extremely small, there is no need to worry about having too much impact on the body.    Recently, in response to microwave radiation, scientists have developed a special fabric called "Faraday fabric", which can block almost all electromagnetic waves.    This research result comes from Drexel University (Drexel University) and has been published in "Carbon" magazine.    The key component of this fabric is a material called MXene, which helps protect wearable devices from interference and protect people from potentially dangerous radiation.    MXenes is a conductive two-dimensional material, which has attracted more and more attention due to its application in sprayable antennas, conductive clay and fast charging battery electrodes.    A few months ago, the Drexel University team described a special MXene material-titanium carbonitride (titanium carbonitride) excellent electromagnetic shielding performance.    Titanium carbonitride is not only very thin (only a few atoms thick), but it absorbs signals instead of reflecting them, so it blocks electromagnetic waves in the process.    In the new study, researchers have discovered a new application of MXene shielding, namely the production of fabrics that shield electromagnetic waves. They immersed a cotton and linen sample in the MXene solution and found that it could eventually block more than 99.9% of the signal.    After careful observation, it seems that MXene material can stick to the fabric fibers very well due to the charge of the material. The team said that this can be made into a durable coating that does not require other pre-treatment or post-treatment processes like other conductive materials.    In the long-term effectiveness test, these fabrics proved to show good performance. After two years of storage under normal conditions, the shielding effect of the sample has only a relatively small drop, between 8% and 13%.   Usually, electromagnetic radiation protection clothing uses a loop formed by metal fibers in the clothing to generate an induced current, and the induced current generates a reverse electromagnetic field for shielding. The metal fiber material can reflect electromagnetic waves, that is, when the aperture of the metal mesh is smaller than 1/4 of the wavelength of the electromagnetic wave, the electromagnetic wave cannot pass through the metal mesh. This achievement provides a better choice for current electromagnetic interference shielding materials. MXene coated fabrics not only surpass the performance of commercial metal coated fabrics, but they can be sustainably produced through aqueous solutions in the form of coatings without additional processing. Or chemical additives. The team said that these shielding fabrics can be used to protect wearable electronic products from interference without adding too much volume to them, and can also be used for those who need to venture into places with dangerous high electromagnetic fields or those who may be exposed. Personnel under strong microwave radiation make protective clothing.

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2020-2024 China antibacterial material market feasibility study report

Organic antibacterial materials have become the mainstream antibacterial materials on the market due to their wide range of sources, long use and development time, mature technology, convenient processing, strong sterilization power, fast sterilization rate, wide antibacterial range, and low price.    Antibacterial material refers to a new type of functional material that has the function of killing or inhibiting microorganisms. It can be used in many fields such as medical treatment, household products, household appliances, food packaging, plastic film, sanitary ceramics, and architectural coatings.    Antibacterial materials can be divided into three categories: natural antibacterial materials, organic antibacterial materials and inorganic antibacterial materials. Natural antibacterial materials include plant-derived antibacterial materials (such as terpenoids and their derivatives, alkaloids, steroids, saponins, lignans, amino acids, etc.), animal-derived antibacterial materials (such as sugars, amino acids, and peptides) Etc.) and microorganism-derived antibacterial materials (such as antibiotics); organic antibacterial materials include quaternary phosphorus salts, quaternary ammonium salts, phenolic alcohol esters, biguanides, imidazoles, etc.; inorganic antibacterial materials may contain metal ions (metal or metal Oxide) type and photocatalytic metal oxide type antibacterial materials. Different types of antibacterial materials have different application fields due to their different properties, costs, and degrees of industrialization. For example, natural antibacterial materials are used in food packaging, microorganism-derived antibacterial materials are used in pharmaceutical manufacturing, and organic antibacterial materials can be used in food packaging and In many fields such as pharmaceutical packaging, water treatment, and coatings, inorganic antibacterial materials have application potential in biomedicine, sewage treatment, and food packaging. Among them, organic antibacterial materials have become the mainstream antibacterial materials on the market due to their wide range of sources, long use and development time, mature technology, convenient processing, strong sterilization power, fast sterilization rate, wide antibacterial range, and low price.    In recent years, the global and Chinese antibacterial material markets have shown rapid growth. According to the "2020-2024 China Antibacterial Material Market Feasibility Study Report" released by Synopsys, the global antibacterial material market is mainly distributed in the United States, Europe and Asia, China, Japan and South Korea. The average annual growth rate in the past five years has been 10% or more. The factors that promote the rapid development of the antimicrobial material market are as follows: First, with the continuous development of the economy, people's income levels have been greatly improved, and social awareness has also changed, and they pay more attention to their own health; second, globalization The advancement of human resources and the convenience of social transportation have made the cancellation of humans more and more frequent, which also created opportunities for the spread of diseases, resulting in an increase in infectious diseases, epidemics, etc., with greater and greater impact. Therefore, governments and people of various countries have , Hygiene and safe living environment is paying more and more attention to promote the development of antibacterial materials; again, scholars, companies and other research on antibacterial materials have never stopped, which has led to the progress of antibacterial material technology, and the thermal stability, durability, Security has been improved to better meet the needs of downstream users.   Industry analysts from Xinsijie said that the continuous advancement of various researches not only improves the performance of antibacterial materials, but also makes the application range of antibacterial materials wider and wider, and the future market prospects for antibacterial materials are broad.

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Only technological innovation can save my country's copper processing industry

In 2015, my country's copper processing industry mainly showed the following characteristics: The growth rate of production capacity and output did not decrease. In 2015, the output of copper products in my country reached 14.987 million tons, a year-on-year increase of 25.2%, an increase of 14.42% over the previous year. The provinces with the largest increase in output were Shandong, Guangdong, Jiangsu and Jiangxi, and Jiangxi ranked first in copper output. Big province. From the analysis of product consumption structure, the latest data shows that the current largest application market for copper processing materials in my country is copper cables for the power industry, and consumption accounts for about 50% of the total copper market consumption.   The investment in fixed assets has not been effectively controlled. In 2015, my country's non-ferrous metal processing projects completed a fixed asset investment of 330.341 billion yuan, accounting for 49.99% of the completed investment in the non-ferrous metal industry. It is still the hottest investment in my country. Among them, 553 copper rolling processing projects are completed, and the project investment is 52.567 billion yuan. Yuan, an increase of 35.44% over the previous year, accounting for 15.91% of the fixed asset investment completed in the manufacturing and rolling of ferrous metal alloys.    During the "Twelfth Five-Year Plan" period, my country has completed a total of 370.15 billion yuan in non-ferrous metal alloy manufacturing and rolling plus fixed asset investment, an average annual increase of 44%. The total investment completed in the first three years of the "Twelfth Five-Year Plan" was 737.29 billion yuan, equivalent to twice that of the five-year period of the "Twelfth Five-Year Plan", indicating that under the current situation, the control of non-ferrous metal production capacity expansion is not effective. At the same time, it can be seen from the top ten provinces and regions in terms of completed investment that production capacity is shifting to the central and western regions, effectively solving regional imbalances.   Import and export trade hardly improves. According to statistics, in 2015, my country imported 649,000 tons of copper processing materials, a year-on-year decrease of 3%; exports were 489,000 tons, a year-on-year decrease of 0.8%. It can be seen from the above data that the world's developed economies have insufficient demand for non-ferrous metals, and my country's non-ferrous metals export situation is slowly recovering. The formulation of short-term plans, annual plans, and investment plans should not have high expectations of the international market, and should still stick to domestic demand. At the same time, my country's non-ferrous metal processing industry is gradually showing the effect of promoting technological progress and industrial adjustment, and its dependence on high-precision processing materials such as special alloys, high-precision strips and rolled copper foils in developed countries has decreased.    Inefficient operation is still the main theme of the economic operation of the copper and aluminum processing industries. The latest data shows that the profit of processing enterprises accounts for a relatively high proportion of the total profit of the non-ferrous metal industry, but the profit margin of main business income is only 4%.    From the perspective of the entire non-ferrous metal industry, due to weak domestic and foreign non-ferrous metal demand, the prices of most varieties fluctuate at low levels. Due to factors such as the rigid increase in production cost factors, companies generally have difficulties in operating, with increasing losses and negative growth in profits from main activities. However, in terms of realizing profits, the situation is different. Relatively speaking, state-owned enterprises have declined, while private enterprises have grown; large and medium-sized enterprises have fallen, and small enterprises have grown; mining and smelting enterprises have fallen; and processing enterprises have grown. As far as the processing industry is concerned, although corporate profits have increased from statistical data, the increase is lower than the increase in output and main business income, and the profit margin of main business income is actually declining.   The industry's own efforts are the key    The ups and downs of raw material prices, the intensification of product homogeneity competition, the continuous decline of copper processing fees, and the slow recovery of domestic and foreign economic conditions have led to uncertain market demand, which has kept many copper processing enterprises in the era of meager profit. "At present, the hope of the development of my country's copper processing industry depends on the improvement of the external environment and the industry's own efforts. The latter is the key and we can control it." Ma Shiguang, Sec

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Only technological innovation can save my country's copper processing industry

In 2015, my country's copper processing industry mainly showed the following characteristics: The growth rate of production capacity and output did not decrease. In 2015, the output of copper products in my country reached 14.987 million tons, a year-on-year increase of 25.2%, an increase of 14.42% over the previous year. The provinces with the largest increase in output were Shandong, Guangdong, Jiangsu and Jiangxi, and Jiangxi ranked first in copper output. Big province. From the analysis of product consumption structure, the latest data shows that the current largest application market for copper processing materials in my country is copper cables for the power industry, and consumption accounts for about 50% of the total copper market consumption.   The investment in fixed assets has not been effectively controlled. In 2015, my country's non-ferrous metal processing projects completed a fixed asset investment of 330.341 billion yuan, accounting for 49.99% of the completed investment in the non-ferrous metal industry. It is still the hottest investment in my country. Among them, 553 copper rolling processing projects are completed, and the project investment is 52.567 billion yuan. Yuan, an increase of 35.44% over the previous year, accounting for 15.91% of the fixed asset investment completed in the manufacturing and rolling of ferrous metal alloys.    During the "Twelfth Five-Year Plan" period, my country has completed a total of 370.15 billion yuan in non-ferrous metal alloy manufacturing and rolling plus fixed asset investment, an average annual increase of 44%. The total investment completed in the first three years of the "Twelfth Five-Year Plan" was 737.29 billion yuan, equivalent to twice that of the five-year period of the "Twelfth Five-Year Plan", indicating that under the current situation, the control of non-ferrous metal production capacity expansion is not effective. At the same time, it can be seen from the top ten provinces and regions in terms of completed investment that production capacity is shifting to the central and western regions, effectively solving regional imbalances.   Import and export trade hardly improves. According to statistics, in 2015, my country imported 649,000 tons of copper processing materials, a year-on-year decrease of 3%; exports were 489,000 tons, a year-on-year decrease of 0.8%. It can be seen from the above data that the world's developed economies have insufficient demand for non-ferrous metals, and my country's non-ferrous metals export situation is slowly recovering. The formulation of short-term plans, annual plans, and investment plans should not have high expectations of the international market, and should still stick to domestic demand. At the same time, my country's non-ferrous metal processing industry is gradually showing the effect of promoting technological progress and industrial adjustment, and its dependence on high-precision processing materials such as special alloys, high-precision strips and rolled copper foils in developed countries has decreased.    Inefficient operation is still the main theme of the economic operation of the copper and aluminum processing industries. The latest data shows that the profit of processing enterprises accounts for a relatively high proportion of the total profit of the non-ferrous metal industry, but the profit margin of main business income is only 4%.    From the perspective of the entire non-ferrous metal industry, due to weak domestic and foreign non-ferrous metal demand, the prices of most varieties fluctuate at low levels. Due to factors such as the rigid increase in production cost factors, companies generally have difficulties in operating, with increasing losses and negative growth in profits from main activities. However, in terms of realizing profits, the situation is different. Relatively speaking, state-owned enterprises have declined, while private enterprises have grown; large and medium-sized enterprises have fallen, and small enterprises have grown; mining and smelting enterprises have fallen; and processing enterprises have grown. As far as the processing industry is concerned, although corporate profits have increased from statistical data, the increase is lower than the increase in output and main business income, and the profit margin of main business income is actually declining.   The industry's own efforts are the key    The ups and downs of raw material prices, the intensification of product homogeneity competition, the continuous decline of copper processing fees, and the slow recovery of domestic and foreign economic conditions have led to uncertain market demand, which has kept many copper processing enterprises in the era of meager profit. "At present, the hope of the development of my country's copper processing industry depends on the improvement of the external environment and the industry's own efforts. The latter is the key and we can control it." Ma Shiguang, Sec

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